On Wednesday 02 March 2005 14:27, Nuutti Kotivuori wrote:
> We have again encountered a nasty and weird problem with UML.
>
> If swap is enabled for a virtual machine, and the virtual machine
> actually swaps something, swapoff at shutdown hangs the machine. Now,
> I could understand this, if it was because the running processes would
> not fit in main memory without swap, but this happens even though all
> other processes have been killed - just init and the script running
> swapoff remains. There's plenty of free memory, but some 500kB of swap
> in use. The swap is a disk file, entirely non-sparse. We are running
> 2.6.9-bs5.
There were some crashes fixed after, upgrade to -bs7. I don't think this is 
fixed, but just in case...
You may also want to try 2.6.11 as host kernel.
> We also had a similar problem earlier (exact same symptoms) - but we
> came to the conclusion then that if devfsd was running, swapoff
> hung. Problem was solved by removing devfsd entirely (we thought it
> might have to do with the locking of pages that devfs does), but now
> it resurfaced again, and there doesn't seem to be any process left to
> blame this time.
>
> Yet again, we are investigating this further - if anyone has any
> ideas, please give a holler.
Hmmm, make sure with some "echo" and commenting / uncommenting in the init 
scripts that it is actually the cause (if you haven't done it already). Not a 
lot, I know, sorry.
> -- Naked

-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729
http://www.user-mode-linux.org/~blaisorblade




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